Oct 20 (Reuters) – After a turbulent week in which some regional U.S. banks flagged bad loan and fraud issues, investors scrutinized lenders’ earnings reports for signs of wider strain across the sector.

Zions Bancorporation (ZION.O), opens new tab posted a third-quarter profit increase on Monday, helped by stronger interest income, despite the $50 million fraud-related charge-off it announced last week.